Improvement in tuyeres



J. M. HARTMAN.

Tuyere. Y

No.4 205344. Mmmm may 9, asm.

Fu@ H C a2 a a N z Y 005 n ci l 72 a /z \A C O OOO Y 3 UNITED STATES PATENT @EET-0E.

JOHN lVl. HARTMAN, OF PHILADELPHIA, PENNSYLVANIA, SSIGNOR TO TAWS.& HARTMAN, OF SAME PLACE.

IMPROVEMENT IN TUYERES.

Specilealou forming part nl' Lelters Patent N0.

205,744, dated July 9, 1R78 ,application filed l in the col'nbination, with the tuyere, ot' a siphon' Vor a suction-pump, whereby the circulation of water through the tuyere is effected; fourthly, 1n the construction of the tuyerepipe and its .connections as hereinafter particularly described; fii'thly, in the combination, with the tuyere and pipe, of a tapered nozzle or reducer, and in the means provided for the removal from the tuyere-of said reducer without detaehin g the tn vere-pipe and connections from the tuyere; sixt-lily, in the combination, with the tuyere and pipe, which are connected by means of a ball-and-socket or oscillatory joint, of devices whereby said joint is closed or heldtogether by a iiexible pressure, thereby dispen sing with the useotl bolts or their equivalent.

A is the tuyere, east in the form ot' two annular shells, with a water-space between. al is the reccivingpipe, which delivers the waterat the nose of the tuyere.

- In some tuyeres the water will flow in a current direct across to the discharge at the op.- posite corner u?, and not circulate around the top of the nose, which is the vital part of the tuyere. To obviate this I carrya pipe, a3, from the discharge-openin g, which pipe termig nates near the nose, thereby giving a much better circulation at the nose of the tuyere.

To prevent the accumulation of air at 'the' upper corner, I drill a small hole in the pipe at e2,throu gh which the air will be lcarried with a small portion of the circulating water, thereby eausin g a more perfect circulation of the water throughout the tuycrc, and consequently a greater durability.

'lytlesberetofore in use have been supplied withwatcr from a level much higher than the pressure forces the water into the furnace to its great detriment. lo obviate this Iattach a Siphon, .B, or other suction arrangement, to the discharge-pipe of the tuyere, and suck the water through the tuycre.

To assist the escape of air, as previously described, from the disehargeopenin g at e2, I carry the discharge-pipe to a higher level, b2, than the top ot' the tuyere. IVhile the blast is on the .furnace its pressure.forces the coal away from the nose of the tuyere; but as soon as it is turned oii',`the coal is crowded against the nose and deiiccts the trickling iron inside the nose, and cuts through the bottom side of, he tuyere. To obviate this I cast the tuyere with the top projecting beyond the bott-0in in the form of an overhanging lip, as shown, a* being the overhanging lip, and a5 the recess.

In tuyeres heretofore in use the end ot' the tuyere-pipe is put into the tuyere, and the joint made by rammiu g in clay and pounded brick, or the end of the pipe is turned taper and fitted Iin. This method gives no exibility, and the pipe breaks by expansion or contraction.v .lt also requires all the parts to be in line, which can be secured only by great waste of time. To obviatethis I turn a face, C', on the metal forming the tuyerc--a globe-face preferred-- and turn a corresponding face on the end of the tuyere pipe. The circulation of water in contact with the metal forming `the face keeps it cool, and prevents it from springing out ot' shape. The globe-face on the end the face turned on the tuyere.

or cylinder under high temperatures of blast, above 1,2000, loses its shape, and also radiates a great amount of heat. To prevent this I make the pipe ot' two or more rigid hollow e 7lnders, D d', inclosi'ng an air-tight space. tween. The .front end is closed by a cap; the rear end is fitted upon the T.piece G. The outside pipe l) remains cool enough to preserve the pipe in shape and give it rigidity. If the heat used is very high I place a sheetiron pipe between the shells Id and l) to eut ott' the radiation. f

tuyere. In the event of a tuyere leaking, this -ot the tuyere-pipe D is cooled by contact with A tuyere-pipe constructed of a single pipe substitute the, flexible pressure caused by the z'le and prevents it from lnirninpv v To obviate this I forni a detachable cap` g',

- which is smaller than the tuyere-pipe d', can

v To preserve the 1contact of the joint C', I do away with the ri gid bolts heretofore in use, and

weighted lever H, hinged upon the fulcrum h1. which exerts a constant pressure upon the connecting-link h2, which is hooked into a rigid staple upon the wall of the furnace neer the tuyere. l

A spring-tension may be placed upon the rod hz by means of a spring below the nut h, and accomplish the saine purpose.

By this ,arrangement any expansion 'of the tuyere-pipe is taken up by the yielding of the weighted lever H, and the joint remains tight. This same device is applicable to connect the other joints of the tuyerepipe. The globejoint It" can also be made on each end of the T-piece G when great ungularity is re uired.

Small projecting pins are cast on the ower side of the tuyere to support the tuycre-pipe while connectingthe parts together.

-The nozzles of tuyeres heretofore in use have been plastered with clay and inserted in the tuyere. 'ille cluiy, being a non-conductor, allows the nozzle to burn away. To obviatc this I form a quick taper in the interior of the tuyere, and fit the nozzle N, metal to metal, against the tuycre. The waterin the interior ot' the tuyee conducts the heatroin the noz,

The operation of a furnace requireswalf'frel quent 'change of nozzles, which has been done heretofore bytaking down the tuyere-pipe.

upon the plece G, through which the nozzle,

be slipped into its place i n the tuyere,

I claim- 1. A water-cooled tuyere formed with a proieeting upper lip, a4, and a recess, a5, below, as' hereln described.

2. The combination, in a. hollow tuyerc, A, of the inlet and outlet pipesl al a3, extending to near the nose of the tuyere, and the air-outlet a2, as herein described.

3. With a. water-cooled tuyere, the combination 0f ai sphon or suction pump to draw the water through the cavity of the Ltuyere,us and forthe purpose herein described.

4. The hollow tuyere A, in combination with the inlet and outlet pipes al a?, the latter bein g provided with the air-hole a2, and thebend b2 above the level of the water-cavity in the tnyere.

5. A tuyere-pipe formed of two or more holi low rigid cylinders, D d', inclosing an airn spa-ce between them, the T-piece G, and the faced cap CQ as herein described.

6. The combination of the taper nozzle N, the tuyere-pipe d', ot' larger internal diameter than the nozzle, and the removable cap rf upon lthe T-picce G.

7. rll1e'combi1 iation ofthe fulcruni'll, thc conucctin g-link h2, and a yielding; tension upon the said link by the weighted lever-H, or its equivalent, to secure thejoint C by a flexible pressure, as herein described.

S. The combination ot' an osci llating joint upon avater-eooled tuyere, an oscilleting'w tuycre-pipe, und a link connecting` the same by ayielding' pressure, substantially as specified.

JOHN ivf.y HARTMAN.

Witnesses:

EDwD. BROWN, JOHN F. GRANT. 

